Extended depth of focus lens implantation after radial keratotomy
Received 13 March 2019
Accepted for publication 14 June 2019
Published 30 July 2019 Volume 2019:13 Pages 1401—1408
Checked for plagiarism Yes
Review by Single-blind
Peer reviewers approved by Dr Melinda Thomas
Peer reviewer comments 2
Editor who approved publication: Dr Scott Fraser
Brandon J Baartman,1 Kayla Karpuk,1 Bradley Eichhorn,2 Tanner J Ferguson,2 Ramu G Sudhagoni,3 John P Berdahl,1 Vance M Thompson1
1Vance Thompson Vision, Sioux Falls, SD, USA; 2University of South Dakota School of Medicine, Vermillion, SD, USA; 3Public Health Department, School of Health Sciences, University of South Dakota, Vermillion, SD, USA
Purpose: To identify the visual performance of radial keratotomy (RK) patients that have undergone cataract surgery with implantation of an extended depth of focus (EDOF) intraocular lens (IOL).
Design: Retrospective chart review with questionnaire.
Methods: Medical charts of patients with a history of RK that had undergone phacoemulsification with implantation of the Tecnis Symfony IOL (J&J Vision) were reviewed. Data collected included preoperative demographics, number of RK incisions, pupil size, and preoperative visual acuity and manifest refraction. Primary outcome measures of the study included postoperative uncorrected distance visual acuity (UCVA) and manifest refraction spherical equivalent (SE) at each follow-up visit. Secondary outcomes included results from a telephone questionnaire assessing visual performance and satisfaction.
Results: Twenty-four eyes of 12 patients were included. UCVA improved from an average Snellen equivalent 20/73 preoperatively to 20/33 at an average final follow-up of 6 months (P=0.0011), while average manifest SE improved from +1.68 D to −0.18 D (P<0.0001). At final follow-up, 15 of 24 eyes (62.5%) were at or within 0.5 D of target refraction, while 20 of 24 eyes (83.3%) were at or within 1.0 D. In total, 79% of eyes (19 of 24) had UCVA of 20/40 or better at distance. In the survey, 78% of patients reported satisfaction with their vision after surgery and 44% of patients reported being spectacle free for all tasks.
Conclusions: An EDOF lens implant can produce good visual outcomes and satisfaction in patients with a history of RK.
Keywords: radial keratotomy, cataract, intraocular lens
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